Local Plastic Response and Slow Heterogeneous Dynamics of Supercooled Liquids
arXiv:2206.11121 · doi:10.1103/PhysRevLett.128.258001
Abstract
We demonstrate, via numerical simulations, that the relaxation dynamics of supercooled liquids correlates well with a plastic length scale measuring a particle's response to impulsive localized perturbations and weakly to measures of local elasticity. We find that the particle averaged plastic length scale vanishes linearly in temperature and controls the super-Arrhenius temperature dependence of the relaxation time. Furthermore, we show that the plastic length scale of individual particles correlates with their typical displacement at the relaxation time. In contrast, the local elastic response only correlates with the dynamics on the vibrational time scale.
Supplementary Material included
References in corpus (5)
- Theoretical perspective on the glass transition and amorphous materials
- Irreversible reorganization in a supercooled liquid originates from localised soft modes
- Identifying structural flow defects in disordered solids using machine learning methods
- Direct measurements of growing amorphous order and non-monotonic dynamic correlations in a colloidal glass-former
- Local elastic response measured near the colloidal glass transition